29,674 results match your criteria Organic Solvents


A facile method for high level dual expression of recombinant and congener protein in a single expression system.

Protein Expr Purif 2018 Dec 15. Epub 2018 Dec 15.

Department of Biochemistry and Biotechnology, Council of Scientific and Industrial Research (CSIR), Central Leather Research Institute (CLRI), Chennai, India. Electronic address:

Protein engineering is an emerging field for developing novel therapeutic proteins and commercial enzymes, along with a major impact on the global market. In recent decades, advanced methods employing protein modification through expansion of the genetic code have led to the development of proteins with new biochemical and physical properties. These techniques have produced engineered proteins with improved attribute comprising substrate relaxation, protein drug conjugation and high stability under extreme conditions of high temperatures, pH and organic solvents. Read More

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http://dx.doi.org/10.1016/j.pep.2018.12.003DOI Listing
December 2018

Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects.

Nat Commun 2018 Dec 17;9(1):5335. Epub 2018 Dec 17.

Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Martensstrasse 7, 91058, Erlangen, Germany.

There is a strong market driven need for processing organic photovoltaics from eco-friendly solvents. Water-dispersed organic semiconducting nanoparticles (NPs) satisfy these premises convincingly. However, the necessity of surfactants, which are inevitable for stabilizing NPs, is a major obstacle towards realizing competitive power conversion efficiencies for water-processed devices. Read More

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http://dx.doi.org/10.1038/s41467-018-07807-5DOI Listing
December 2018

Whole-cell catalytic synthesis of puerarin monoesters and analysis of their antioxidant activities.

J Agric Food Chem 2018 Dec 18. Epub 2018 Dec 18.

Puerarin, an important isoflavonoid from the edible root of Pueraria lobata, shows multiple bioactivities but suffers from low bioavailability. In this study, a new whole-cell catalytic method for acylation modification of puerarin was developed. Among the 12 strains tested, Aspergillus oryzae showed the highest catalytic activity and selectively catalyzed acylation of puerarin at the 6''-hydroxyl group. Read More

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http://dx.doi.org/10.1021/acs.jafc.8b05805DOI Listing
December 2018

Recent Developments in the Optimization of the Bulk Heterojunction Morphology of Polymer: Fullerene Solar Cells.

Materials (Basel) 2018 Dec 16;11(12). Epub 2018 Dec 16.

LEPABE, Department of Chemical Engineering, University of Porto, 4200-465 Porto, Portugal.

Organic photovoltaic (OPV) devices, made with semiconducting polymers, have recently attained a power conversion efficiency (PCE) over 14% in single junction cells and over 17% in tandem cells. These high performances, together with the suitability of the technology to inexpensive large-scale manufacture, over lightweight and flexible plastic substrates using roll-to-roll (R2R) processing, place the technology amongst the most promising for future harvesting of solar energy. Although OPVs using non-fullerene acceptors have recently outperformed their fullerene-based counterparts, the research in the development of new fullerenes and in the improvement of the bulk-heterojunction (BHJ) morphology and device efficiency of polymer:fullerene solar cells remains very active. Read More

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http://dx.doi.org/10.3390/ma11122560DOI Listing
December 2018

Improved growth of pea, lettuce, and radish plants using the slow release of hydrogen sulfide from GYY-4137.

PLoS One 2018 17;13(12):e0208732. Epub 2018 Dec 17.

Department of Chemistry, University of Iowa, Iowa City, Iowa, United States of America.

Hydrogen sulfide (H2S) is a key gasotransmitter in agriculture and has been reported to increase the growth of plants in the first two weeks and to mitigate the effects of environmental stressors. GYY-4137 is widely used in these studies because it slowly releases H2S, but there is disagreement as to whether it requires enzymes to release H2S. In this article we describe the release of H2S in water without enzymes and that it releases H2S faster in organic solvents than in water or when mixed in topsoil. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0208732PLOS
December 2018
2 Reads

Solubilization of Carbon Nanotubes with Ethylene-Vinyl Acetate for Solution-Processed Conductive Films and Charge Extraction Layers in Perovskite Solar Cells.

ACS Appl Mater Interfaces 2018 Dec 17. Epub 2018 Dec 17.

Department of Physics, Clarendon Laboratory , University of Oxford , Parks Road , Oxford OX1 3PU , U.K.

Carbon nanotube (CNT) solubilization via non-covalent wrapping of conjugated semiconducting polymers is a common technique used to produce stable dispersions for depositing CNTs from solution. Here, we report the use of a non-conjugated insulating polymer, ethylene vinyl acetate (EVA), to disperse multi- and single-walled CNTs (MWCNT and SWCNT) in organic solvents. We demonstrate that despite the insulating nature of the EVA, we can produce semitransparent films with conductivities of up to 34 S/cm. Read More

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http://pubs.acs.org/doi/10.1021/acsami.8b15396
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http://dx.doi.org/10.1021/acsami.8b15396DOI Listing
December 2018
1 Read

Conversion of Sugars and Biomass to Furans Using Heterogeneous Catalysts in Biphasic Solvent Systems.

ChemCatChem 2018 Nov 13;10(21):4805-4816. Epub 2018 Sep 13.

Department of Chemical and Biological Engineering Montana State University Bozeman 59717-2220 MT USA.

Within the last decade, interest in using biphasic systems for producing furans from biomass has grown significantly. Biphasic systems continuously extract furans into the organic phase, which prevents degradation reactions and potentially allows for easier separations of the products. Several heterogeneous catalyst types, including zeolites, ion exchange resins, niobium-based, and others, have been used with various organic solvents to increase furan yields from sugar dehydration reactions. Read More

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http://dx.doi.org/10.1002/cctc.201800926DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6283062PMC
November 2018

Crosslinking of chitosan films processed by compression molding.

Carbohydr Polym 2019 Feb 22;206:820-826. Epub 2018 Nov 22.

BIOMAT research group, University of the Basque Country (UPV/EHU), Department of Chemical and Environmental Engineering, Faculty of Engineering of Gipuzkoa, Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain.

An alternative approach towards more sustainable chitosan films, through their manufacture by thermo-compression molding, was explore in this work. This strategy permitted the reduction of production times and avoided the use of organic solvents since biopolymer and acid were mixed in their solid form. Furthermore, the acid used as a crosslinker was citric acid, a natural policarboxylic acid, which promoted the reaction with chitosan, as shown by Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). Read More

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http://dx.doi.org/10.1016/j.carbpol.2018.11.064DOI Listing
February 2019

Real-time dynamic analysis with low-field nuclear magnetic resonance of residual oil and sophorolipids concentrations in the fermentation process of Starmerella bombicola.

J Microbiol Methods 2018 Dec 12. Epub 2018 Dec 12.

State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address:

The yeast Starmerella bombicola is known to produce sophorolipids (SLs) by fermentation method. In the fermentative production of SLs, at least three phases i.e. Read More

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http://dx.doi.org/10.1016/j.mimet.2018.12.007DOI Listing
December 2018
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Fluorine-free water-in-ionomer electrolytes for sustainable lithium-ion batteries.

Nat Commun 2018 Dec 14;9(1):5320. Epub 2018 Dec 14.

Helmholtz Institute Münster - Forschungszentrum Jülich GmbH (IEK 12), Corrensstrasse 46, 48149 Münster, D-48149, Münster, Germany.

The continuously increasing number and size of lithium-based batteries developed for large-scale applications raise serious environmental concerns. Herein, we address the issues related to electrolyte toxicity and safety by proposing a "water-in-ionomer" type of electrolyte which replaces organic solvents by water and expensive and toxic fluorinated lithium salts by a non-fluorinated, inexpensive and non-toxic superabsorbing ionomer, lithium polyacrylate. Interestingly, the electrochemical stability window of this electrolyte is extended greatly, even for high water contents. Read More

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http://dx.doi.org/10.1038/s41467-018-07331-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6294254PMC
December 2018
1 Read

Synthesis and Properties of Magnetic Aryl-Imidazolium Ionic Liquids with Dual Brønsted/Lewis Acidity.

Materials (Basel) 2018 Dec 13;11(12). Epub 2018 Dec 13.

Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan.

A series of unique tunable aryl-imidazolium magnetic ionic liquids (MILs) with dual acidity that contain both Brønsted and Lewis acidic sites (abbreviated as B-L MILs) were synthesized and characterized using nuclear magnetic resonance and mass spectrometry. Physical properties, such as thermal properties, magnetic susceptibility, and Brønsted and Lewis acidity, were measured. These properties were found to depend on the cation structure. Read More

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http://dx.doi.org/10.3390/ma11122539DOI Listing
December 2018

High-Performance Synthesis of Phosphorus-Doped Graphene Materials and Stabilization of Phosphoric Micro- and Nanodroplets.

Langmuir 2018 Dec 14. Epub 2018 Dec 14.

Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , Leninsky Prospekt, 47 , Moscow 119991 , Russia.

A thermally induced cascade process leading to the formation of stable micro- and nanometer-size phosphoric droplets was developed starting from a molecular precursor. Microwave-induced pyrolysis of 1,2,3,4,5-pentaphenylphosphole oxide proceeded through a series of subsequent transformations involving formation of phosphorus-doped graphene oxide layers, seeding of carbon surface with phosphorus centers, and assembling of stable droplets. A complex nanostructured organization of the material was established in a remarkably short time of 3 min, and the process was performed in a thermally induced manner using microwave irradiation. Read More

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http://dx.doi.org/10.1021/acs.langmuir.8b03417DOI Listing
December 2018

Sustainable Hydrocarbon Oligomer Solvent Systems for Sequestration of Trace Organics from Water.

ChemSusChem 2018 Dec 11. Epub 2018 Dec 11.

Texas A&M University at Qatar, Chemistry, P.O. Box 23874, Doha, QATAR.

Low viscosity poly(α-olefin)s (PAOs) either alone or with functional hydrocarbon oligomer cosolvents are nontoxic, nonvolatile, recyclable solvent systems that effectively and efficiently sequester trace amounts of nonpolar organic compounds like benzene and halogenated organics from water. More polar compounds including perfluorooctanoic acid and nitrobenzene or water miscible compounds like tetrahydrofuran and triethylamine too can be sequestered if the PAO phase contains a H-bonding PAO-anchored cosolvent. Read More

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http://dx.doi.org/10.1002/cssc.201802851DOI Listing
December 2018

A diversity of alkylation/acylation products of uracil and its derivatives: synthesis and a structural study.

Org Biomol Chem 2018 Dec 14. Epub 2018 Dec 14.

Pharmaceutical Research Institute, 8 Rydygiera Str., 01-793 Warsaw, Poland. and University of Warsaw, Faculty of Chemistry, 1 Pasteura Str., 02-093 Warsaw, Poland.

tert-Butyl dicarbonate (Boc2O) and ethyl iodide (EtI) reactions with uracil (U), thymine (T) and 6-methyluracil (6-MU) were performed following routine procedures in pyridine/DMF solvents and with DMAP as the catalyst. Among 20 synthesized compounds, a derivative of 6-methyluracil substituted by the Boc-pyridine moiety at the C5 position appeared unexpectedly. The NMR spectra confirmed the molecular structure of all uracil derivatives. Read More

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http://dx.doi.org/10.1039/c8ob02552eDOI Listing
December 2018

Stable Tb(III)-Based Metal-Organic Framework: Structure, Photoluminescence, and Chemical Sensing of 2-Thiazolidinethione-4-carboxylic Acid as a Biomarker of CS.

Inorg Chem 2018 Dec 14. Epub 2018 Dec 14.

School of Chemical Science and Engineering , Tongji University , Siping Road 1239 , Shanghai 200092 , China.

A novel three-dimensional microporous framework, [Tb(pddb)phen(ox)] (Tb-MOF), was synthesized hydrothermally with V-shaped 4,4'-(pyridine-2,6-diyl)dibenzoic acid (Hpddb), oxalate (ox), and 1,10-phenanthroline (phen). The framework of Tb-MOF features one-dimensional channels functionalized with pyridine-N Lewis base groups and the absence of coordinated and lattice water molecules in the structure. The Tb-MOF exhibits high thermostability (up to 385 °C) and chemical stability in a wide pH range (4-11) and common organic solvents as well as boiling water. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.8b02738DOI Listing
December 2018

Racemic Fluorescence Probe for Enantiomeric Excess Determination: Application of Cononsolvency of a Polymer in Sensing.

Authors:
Shifeng Nian Lin Pu

J Org Chem 2018 Dec 14. Epub 2018 Dec 14.

Both racemic and optically active 3,3'-diformyl-1,1'-BINOL-based diinitiators (BINOL = 1,1'-bi-2-naphthol) were used to carry out the atom transfer radical polymerization (ATRP) of N-isopropylacrylamide to make polymers Rac-1, (R)-1 and (S)-1 which are soluble in water as well as organic solvents. These polymers are found to exhibit a unique cononsolvency property. Mixing an aqueous solution of a polymer and Zn2+ with a dichloromethane solution of (S)- or (R)-amino alcohols led to the formation of polymer films at the interface of the water and dichloromethane phases. Read More

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http://dx.doi.org/10.1021/acs.joc.8b02793DOI Listing
December 2018

Optimization and Validation of a Chromatographic Method for the Quantification of Isoniazid in Urine of Tuberculosis Patients According to the European Medicines Agency Guideline.

Antibiotics (Basel) 2018 Dec 11;7(4). Epub 2018 Dec 11.

Química Bioanalítica, Departament de Química Física i Analítica, Escola Superior de Tecnologia i Ciències Experimentals, Universitat Jaume I, 12071 Castelló, Spain.

Isoniazid is a drug that is widely used against tuberculosis. However, it shows high interpatient variability in metabolism kinetics and clinical effect, which complicates the prescription of the medication and jeopardizes the success of the therapy. Therefore, in a specific patient, the pharmacokinetics of the drug must be elucidated to decide the proper dosage and intake frequency to make the drug suitable for therapeutic drug monitoring. Read More

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http://dx.doi.org/10.3390/antibiotics7040107DOI Listing
December 2018

Solvents to Fragments to Drugs: MD Applications in Drug Design.

Molecules 2018 Dec 11;23(12). Epub 2018 Dec 11.

Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain.

Simulations of molecular dynamics (MD) are playing an increasingly important role in structure-based drug discovery (SBDD). Here we review the use of MD for proteins in aqueous solvation, organic/aqueous mixed solvents (MDmix) and with small ligands, to the classic SBDD problems: Binding mode and binding free energy predictions. The simulation of proteins in their condensed state reveals solvent structures and preferential interaction sites (hot spots) on the protein surface. Read More

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http://dx.doi.org/10.3390/molecules23123269DOI Listing
December 2018

Response Surface Methodology for the Optimization of Ultrasound-Assisted Extraction of Tetrodotoxin from the Liver of .

Toxins (Basel) 2018 Dec 10;10(12). Epub 2018 Dec 10.

Laboratory of Aquatic Product Processing and Quality Safety, Marine Fisheries Research Institute of Zhejiang, Zhoushan 316100, China.

Tetrodotoxin (TTX) is a marine biotoxin that has high scientific value. However, the lack of efficient TTX extraction and preparation methods has led to a scarcity of TTX samples for clinical application. In this study, TTX from the liver of was ultrasound-assisted extracted with acidified organic solvents. Read More

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http://dx.doi.org/10.3390/toxins10120529DOI Listing
December 2018

Reactive cyclic intermediates in the ProTide prodrugs activation: trapping the elusive pentavalent phosphorane.

Org Biomol Chem 2018 Dec 13. Epub 2018 Dec 13.

Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic. and Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic.

Nucleotide prodrugs (ProTides) based on phosphate or phosphonate compounds are potent and successfully marketed antiviral drugs. Although their biological properties are well explored, experimental evidence on the mechanism of their activation pathway is still missing. In this study, we synthesized two ProTide analogues, which can be activated by UV light. Read More

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http://dx.doi.org/10.1039/c8ob02870bDOI Listing
December 2018

Revisited Mechanism of Reaction Between Model Lysine Amino Acid Side Chain and 4-Hydroxynonenal in Different Solvent Environments.

J Org Chem 2018 Dec 13. Epub 2018 Dec 13.

We revisit the reaction mechanism of reaction between model lysine side chain and reactive aldehyde 4-hydroxynonenal in different solvents with increasing water content. We show by model organic reactions and qualitative spectrometric analysis that non-polar pyrrole adduct is dominantly formed in non-aqueous solvents dichloromethane and acetonitrile. On the other hand, in aqueous acetonitrile and neat water, other polar products are also isolated including Michael adducts, hemiacetal adducts and pyridinium salt adducts, at the same time decreasing the ratio of non-polar products vs polar products. Read More

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http://dx.doi.org/10.1021/acs.joc.8b02231DOI Listing
December 2018

Ultrasound mediated accelerated Anti-influenza activity of Aloe vera.

Sci Rep 2018 Dec 12;8(1):17782. Epub 2018 Dec 12.

Department of Environmental Health Sciences, Konkuk University, Seoul, 143-701, Korea.

Aloe vera (AV) is popular and has been commercialized as a beauty product, laxative, herbal medicine, the antimicrobial activity of AV is proven. The antiviral activity of AV however, has not been well documented except for a handful reports. Till date extraction of AV compounds is popularized using organic solvents, since the active components are effectively extracted in methanol. Read More

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http://dx.doi.org/10.1038/s41598-018-35935-xDOI Listing
December 2018

Highly Conductive Hydrogel Polymer Fibers toward Promising Wearable Thermoelectric Energy Harvesting.

ACS Appl Mater Interfaces 2018 Dec 7. Epub 2018 Dec 7.

Jiangxi Engineering Laboratory of Waterborne Coatings , Jiangxi Science and Technology Normal University , Nanchang 330013 , People's Republic of China.

The requirement of a portable electron is functioning as a driving force for a wearable energy instrument. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), as one of the most promising organic electron materials, has been widely studied in energy conversion devices. However, the efforts for PEDOT:PSS fibers are insufficient to boost the development of wearable thermoelectric energy harvesting. Read More

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http://dx.doi.org/10.1021/acsami.8b15332DOI Listing
December 2018

Association of occupational exposures with cardiovascular disease among US Hispanics/Latinos.

Heart 2018 Dec 11. Epub 2018 Dec 11.

Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, Illinois, USA.

Objective: Cardiovascular disease (CVD) is a leading cause of mortality and morbidity in the USA. The role of occupational exposures to chemicals in the development of CVD has rarely been studied even though many agents possess cardiotoxic properties. We therefore evaluated associations of self-reported exposures to organic solvents, metals and pesticides in relation to CVD prevalence among diverse Hispanic/Latino workers. Read More

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http://dx.doi.org/10.1136/heartjnl-2018-313463DOI Listing
December 2018

Synthetic Methodology for Structurally defined and Unidirectional Insulated Molecular Wires via Iterative Intramolecular Slippage.

Chem Asian J 2018 Dec 7. Epub 2018 Dec 7.

Osaka Dental University, JAPAN.

Unidirectional insulated molecular wires (IMWs) were precisely synthesized via iterative cross-coupling reactions in organic solvents and subsequent intramolecular slippage transformation in aqueous solvents. This programmable synthetic procedure selectively afforded both insulated and uninsulated molecular wires bearing oligo (phenylene ethynylene) and permethylated α-cyclodextrins with well-defined conjugation lengths and supramolecular structures. High selectivity of this method was confirmed by NMR and mass spectroscopic analyses. Read More

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http://dx.doi.org/10.1002/asia.201801706DOI Listing
December 2018
1 Read

Reactions in Water-A Greener Approach Using Ruthenium Catalysts.

Chem Rec 2018 Dec 7. Epub 2018 Dec 7.

Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad, 500007.

Reactions using transition metals as catalysts have emerged as an efficient method in the recent times. However, the selection of solvent plays a crucial role in this regard. Several solvents used traditionally suffer majorly with problems of toxicity; high boiling point etc. Read More

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http://dx.doi.org/10.1002/tcr.201800142DOI Listing
December 2018

The Use of Molecular Oxygen for Liquid Phase Aerobic Oxidations in Continuous Flow.

Top Curr Chem (Cham) 2018 Dec 11;377(1). Epub 2018 Dec 11.

Center for Continuous Synthesis and Processing (CCFLOW), Research Center Pharmaceutical Engineering (RCPE), Inffeldgasse 13, 8010, Graz, Austria.

Molecular oxygen (O) is the ultimate "green" oxidant for organic synthesis. There has been recent intensive research within the synthetic community to develop new selective liquid phase aerobic oxidation methodologies as a response to the necessity to reduce the environmental impact of chemical synthesis and manufacture. Green and sustainable chemical processes rely not only on effective chemistry but also on the implementation of reactor technologies that enhance reaction performance and overall safety. Read More

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http://dx.doi.org/10.1007/s41061-018-0226-zDOI Listing
December 2018
1 Read

Heterologous and in vitro reconstitution of fuscanodin, a lasso peptide from Thermobifida fusca.

J Am Chem Soc 2018 Dec 11. Epub 2018 Dec 11.

Lasso peptides are a class of ribosomally-derived natural products typified by their threaded rotaxane structure. The conversion of a linear precursor peptide into a lasso peptide structure requires two enzymatic activities: cleavage of the precursor via a cysteine protease and cyclization via isopeptide bond formation. In vitro studies of lasso peptide enzymology have been hampered by difficulties in obtaining pure, soluble enzymes. Read More

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http://pubs.acs.org/doi/10.1021/jacs.8b10724
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http://dx.doi.org/10.1021/jacs.8b10724DOI Listing
December 2018
4 Reads

On the Mesoscale Solubility in Liquid Solutions and Mixtures.

J Phys Chem B 2018 Dec 11. Epub 2018 Dec 11.

We report on a mesoscale solubility reflecting the fact that solubility is achieved not only by the well-known "like likes like" or "like dissolves like" based on molecular solvation but also on mesoscale solubilization of dislike compounds characterized in that the solubility (homogeneous distribution over the whole volume of the system) is achieved on a mesoscale level ranging from tens to hundreds of nanometers. It is shown that mesoscale solubility is a spontaneously occurring, literally everywhere present phenomenon which was hidden and overlooked for a long time. This paper reveals the physical mechanism of mesoscale solubilization comprising nucleation and aggregation accompanied by the development of significant surface zeta potentials on nanoprecipitates giving them a long-term stability. Read More

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http://dx.doi.org/10.1021/acs.jpcb.8b10638DOI Listing
December 2018

Analysis of polyhalogenated carbazoles in sediment using liquid chromatography-tandem mass spectrometry.

Ecotoxicol Environ Saf 2018 Dec 5;170:148-155. Epub 2018 Dec 5.

Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry and Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China. Electronic address:

The purpose of this study was to develop a novel and sensitive method for the analysis of carbazole and polyhalogenated carbazoles (PHCs) in sediment using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Briefly, 5.0 g of freeze-dried sediment samples were extracted with dichloromethane using pressurized liquid extraction (PLE). Read More

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http://dx.doi.org/10.1016/j.ecoenv.2018.11.131DOI Listing
December 2018

Poly(methyl methacrylate) films reinforced with coconut shell lignin fractions to enhance their UV-blocking, antioxidant and thermo-mechanical properties.

Int J Biol Macromol 2018 Dec 4. Epub 2018 Dec 4.

Department of Organic and Inorganic Chemistry, Federal University of Ceara, 60440-900 Fortaleza, CE, Brazil. Electronic address:

Lignin is a high added-value product obtained from agrowastes through organosolv process to yield materials for technological applications. Here, coconut shell organosolv lignin was fractionated using green solvents (acetone and ethanol) and incorporated in poly(methyl methacrylate) (PMMA) films. The non-fractionated (WCSAL) and soluble fractions (ACT-F and EtOH-F) were completely characterized regarding their structures. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2018.12.043DOI Listing
December 2018

Microwave mediated synthesis and characterization of CeO-GO hybrid composite for removal of chromium ions and its antibacterial efficiency.

J Environ Sci (China) 2019 Feb 29;76:65-79. Epub 2018 Mar 29.

Department of studies in Earth Science, Mansagangothri, University of Mysore, Mysore 570006, India; Centre for Materials Science and Technology, Vijana Bhavan, Manasagangothri, University of Mysore, Mysore 570006, India. Electronic address:

A facile fabrication and processing of cerium oxide-graphene oxide (CeO-GO) hybrid nanocomposites without the use of any surfactant or any organic solvents using chemical method and treatment with microwave irradiation technique are reported. In-situ hexagonal nano cerium oxide particles embedded on the layered surface of GO sheets were investigated for the photodegradation of dyes, removal of chromium Cr(VI) ions and against antibacterial studies. The results imply that hybrid nanocomposites shows enhanced 5-folds of photocatalytic activities in UV (ultraviolet) light irradiation and exhibited rapid efficiency in the elimination of chromium ion better than the pure GO and CeO, which are inhibited by competent photosensitive electron inoculation and controlling the electron-hole recombination. Read More

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http://dx.doi.org/10.1016/j.jes.2018.03.027DOI Listing
February 2019

Update on the epidemiology, risk factors, and disease outcomes of systemic sclerosis.

Best Pract Res Clin Rheumatol 2018 04 14;32(2):223-240. Epub 2018 Sep 14.

Department of Rheumatology, Zurich University Hospital, Zurich, Switzerland; Department of Internal Medicine and Rheumatology, Cantacuzino Hospital, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania. Electronic address:

Systemic sclerosis (SSc) is a chronic immune-mediated connective tissue disease with heterogeneous organ involvement. New classification criteria were developed allowing disease identification even before the onset of its hallmark, skin fibrosis. Incidence and prevalence vary among reports and are influenced by methodology. Read More

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http://dx.doi.org/10.1016/j.berh.2018.08.005DOI Listing

A thermophilic microorganism from Deception Island, Antarctica with a thermostable glutamate dehydrogenase activity.

Biol Res 2018 Dec 8;51(1):55. Epub 2018 Dec 8.

Fundación Científica y Cultural Biociencia, José Domingo Cañas 2280, Santiago, 7750132, Chile.

Background: The Antarctic continent is a source of extreme microorganisms. Millions of years of isolation have produced unique biodiversity with adaptive responses to its extreme environment. Although the Antarctic climate is mainly cold, the presence of several geothermal sites, including thermal springs, fumaroles, hot soils and hydrothermal vents, provides ideal environments for the development of thermophilic and hyperthermophilic microorganisms. Read More

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http://dx.doi.org/10.1186/s40659-018-0206-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6286571PMC
December 2018

Two Stable Zn-Cluster-Based Metal-Organic Frameworks with Breathing Behavior: Synthesis, Structure, and Adsorption Properties.

Inorg Chem 2018 Dec 10. Epub 2018 Dec 10.

Beijing Institute of Applied Meteorology , Beijing 100029 , P. R. China.

Two stable Zn-cluster-based MOFs, [Zn(btz)(atdbc)(DMF)]·3DMF·12HO (compound 1, Hbtz = 1 H-benzotriazole, Hatdbc = 4,4'-(4-amino-1,2,4-triazol-3,5-diyl)dibenzoic acid, DMF = N, N-dimethylformamide) and [Zn(btz)(bcpt)]·3DMF (compound 2, Hbcpt = 3,5-bis(4'-carboxy-phenyl)-1,2,4-triazole), have been successfully constructed by adopting the mixed ligands approach. Both the compounds exhibit high chemical stability under aqueous solution and common organic solvents. Especially, compounds 1 and 2 can be stable in pH = 2 and pH = 12 solutions. Read More

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http://dx.doi.org/10.1021/acs.inorgchem.8b02507DOI Listing
December 2018

The polyphenolic-polysaccharide complex of Agrimonia eupatoria L. as an indirect thrombin inhibitor - isolation and chemical characterization.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 29, 50-370 Wrocław, Poland; Regional Specialist Hospital in Wrocław, Research and Development Centre, Kamieńskiego 73a, 51-124 Wrocław, Poland.

The polyphenolic-polysaccharide complex was isolated from the dried aerial parts of the medicinal plant Agrimonia eupatoria L. using a multi-step process involving the degreasing of the plant material by extraction with organic solvents, followed by extraction with hot alkali, neutralization, further separation with organic solvents and dialysis. The complex was homogeneous with a molecular weight of about 55 × 10 g/mol and consisted mainly of carbohydrates and polyphenols matrix, composed of lignin-related units, with the dominance of dimethoxyphenyl structures. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2018.12.017DOI Listing
December 2018
2 Reads

Robustly Superhydrophobic Conductive Textile for Efficient Electromagnetic Interference Shielding.

ACS Appl Mater Interfaces 2018 Dec 6. Epub 2018 Dec 6.

Superhydrophobic electromagnetic interference (EMI) shielding textile (EMIST) is of great significance to the safety and long-term service of all-weather outdoor equipment. However, it is still challenging to achieve long-term durability and stability under external mechanical deformations or other harsh service conditions. Herein, by designing and implementing silver nanowire (AgNW) networks and a superhydrophobic coating onto a commercial textile, we demonstrate a highly robust superhydrophobic EMIST. Read More

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http://dx.doi.org/10.1021/acsami.8b18459DOI Listing
December 2018
1 Read

Serum organochlorine pesticides residues and risk of cancer: A case-control study.

Saudi J Biol Sci 2018 Nov 17;25(7):1284-1290. Epub 2017 Oct 17.

College of Plant Sciences and Technology, Huazhong Agriculture University, Wuhan 430070, PR China.

Organochlorine pesticides (OCPs) are frequently used worldwide as insecticides, fungicides, herbicides and termiticides and have been associated with a variety of cancers in animal and human studies. In the present study, we examined residues of fourteen OCPs in the serum samples of diagnosed cancer patients and healthy residents of Karachi, Pakistan. A random collection of fasting blood samples was carried out from the donors with informed consent. Read More

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http://dx.doi.org/10.1016/j.sjbs.2017.10.023DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6252000PMC
November 2018
0.741 Impact Factor

Organic chemicals from diesel exhaust particles affects intracellular calcium, inflammation and β-adrenoceptors in endothelial cells.

Toxicol Lett 2018 Nov 29. Epub 2018 Nov 29.

Department of Air Pollution and Noise, Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, Oslo, Norway. Electronic address:

Exposure to diesel exhaust particles (DEP) may contribute to endothelial dysfunction and cardiovascular disease. DEP, extractable organic material from DEP (DEP-EOM) and certain PAHs seem to trigger [Ca] increase as well as inflammation via GPCRs like βARs and PAR-2. In the present study we explored the involvement of βARs and PAR-2 in effects of DEP-EOM on [Ca] and expression of inflammation-associated genes in the endothelial cell-line HMEC-1. Read More

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http://dx.doi.org/10.1016/j.toxlet.2018.11.009DOI Listing
November 2018

Evaluation of protein separations based on hydrophobic interaction chromatography using polyethylene terephthalate capillary-channeled polymer (C-CP) fiber phases.

J Chromatogr A 2018 Nov 26. Epub 2018 Nov 26.

Department of Chemistry, Biosystems Research Complex, Clemson University, Clemson, SC, 29634, United States. Electronic address:

Poly(ethylene terephthalate) (polyester, PET) capillary-channeled polymer fibers are used as the stationary phase for the separation of a synthetic protein mixtures composed of cytochrome c, myoglobin, ribonuclease A, lysozyme, α-chymotrypsinogen A, α-chymotrypsin and holo-transferrin. Polyester is a useful phase for HIC, having a mixed alkyl and aromatic backbone to yield mildly hydrophobic properties, an aromatic functionality allowing for π-π interactions, and carboxylate end groups adding hydrophilicity. In addition, the lack of extraneous hydrophobic ligands or charged surface species alleviates secondary interactions between proteins and common support phases. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S00219673183149
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http://dx.doi.org/10.1016/j.chroma.2018.11.068DOI Listing
November 2018
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Chemical analysis techniques and investigation of polycyclic aromatic hydrocarbons in fruit, vegetables and meats and their products.

Food Chem 2019 Mar 24;277:156-161. Epub 2018 Oct 24.

Department of Food Science and Biotechnology, Dongguk University-Seoul, Goyangsi 10326, Republic of Korea. Electronic address:

The current investigation was performed to evaluate the chemical analytical techniques for PAHs (organic, carcinogenic and mutagenic compounds) in food. It also determines the content of eight polycyclic aromatic hydrocarbons (PAHs) in frequently consumed fruit, vegetables, meats and their products. The methodology included saponification or ultrasonication, liquid-liquid extraction with solvents like n-hexane, clean-up using a silica solid phase extraction cartridge and a gas chromatography-mass spectrometry technique. Read More

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http://dx.doi.org/10.1016/j.foodchem.2018.10.114DOI Listing

Structural and functional characterization of polyethylene terephthalate hydrolase from Ideonella sakaiensis.

Biochem Biophys Res Commun 2018 Nov 27. Epub 2018 Nov 27.

Department of Biophysics, The Health Science Center, Peking University, Beijing, 100191, China; Electron Microscopy Analysis Laboratory, The Health Science Center, Peking University, Beijing, 100191, China; Center for Protein Science, Peking University, Beijing, 100871, China. Electronic address:

Polyethylene terephthalate (PET) hydrolase from Ideonella sakaiensis (IsPETase) can be used to degrade PET. In order to use IsPETase in industry, we studied the enzymatic activity of IsPETase in different conditions containing environmental and physicochemical factors commonly found in nature. We observed that salts and glycerol enhanced the enzymatic activity, while detergents and organic solvents reduced the enzymatic activity. Read More

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http://dx.doi.org/10.1016/j.bbrc.2018.11.148DOI Listing
November 2018

Facile Synthesis of Resveratrol Nanogels with Enhanced Fluorescent Emission.

Macromol Biosci 2018 Dec 5:e1800438. Epub 2018 Dec 5.

Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.

Herein, a kind of fluorescent resveratrol nanogels via one-pot thiol-ene Michael addition polymerization of resveratrol triacrylate, 1,6-hexanedithiol, and methoxyl poly(ethylene glycol) acrylate is prepared. The resultant nanogels can be well-dispersed in water with a hydrodynamic radius of around 68 nm, and the nanogels are stable in both water and organic solvents. Moreover, the resveratrol nanogels exhibit elevated fluorescence intensity compared to free resveratrol, and the quantum yield of resveratrol nanogels is estimated to be 5. Read More

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http://doi.wiley.com/10.1002/mabi.201800438
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http://dx.doi.org/10.1002/mabi.201800438DOI Listing
December 2018
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One-dimensional networks formed via the self-assembly of anthracenedibenzoic acid with zinc(II).

Acta Crystallogr C Struct Chem 2018 Dec 30;74(Pt 12):1774-1780. Epub 2018 Nov 30.

Department of Chemistry and Biochemistry, School of Green Chemistry and Engineering, University of Toledo, 2801 W. Bancroft St., Toledo, OH 43606, USA.

Self-assembly of metal-organic coordination polymers occurs because of enthalpically favorable interactions. In the case of the bulky 4,4'-(anthracene-9,10-diyl)dibenzoic acid ligand (abdH), we demonstrate that the presence of numerous π-π and C-H.. Read More

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http://dx.doi.org/10.1107/S2053229618016649DOI Listing
December 2018
1 Read

Transition Metal-mediated Reactions in Biological Media.

Chimia (Aarau) 2018 Nov;72(11):791-801

Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;, Email:

Transition-metal catalysis has changed the way in which chemical reactions can be accomplished. While most metal-catalyzed reactions have been achieved in organic solvents, recent work has demonstrated that many of these transformations can be made compatible with water. These discoveries have stimulated the search for metal catalysts that are capable of achieving designed reactions in biological settings, and eventually behave as non-natural enzymes working in native cellular environments. Read More

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http://dx.doi.org/10.2533/chimia.2018.791DOI Listing
November 2018

Molecular "Building Block" and "Side Chain Engineering": Approach to Synthesis of Multifunctional and Soluble Poly(pyrrole phenylene)s.

Macromol Rapid Commun 2018 Dec 4:e1800749. Epub 2018 Dec 4.

Polymer Electronics Research Centre, School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand.

Here, the synthesis of a novel poly(pyrrole phenylene) (PpyP) that is both modular in ways of functionalization and soluble in organic solvents is reported, and therefore solution processable. This is achieved through the functionalization of the side-chain substituents in pyrrole phenylene (PyP) repeating units. Butyl acrylate brushes are first grafted through atom transfer radical polymerization from one type of PyP, followed by oxidative chemical co-polymerization of the grafted PyP with a PyP bearing different side chains-either an azide or a methoxy moiety, resulting in a soluble PpyP where solubility is not dopant-dependent. Read More

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http://doi.wiley.com/10.1002/marc.201800749
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http://dx.doi.org/10.1002/marc.201800749DOI Listing
December 2018
5 Reads

Linseed () Oil Extraction 
Using Different Solvents.

Food Technol Biotechnol 2018 Sep;56(3):366-372

Department of Food Engineering, URI Erechim, Av. Sete de Setembro 1621, 99700-000, Erechim, RS, Brazil.

This work aims at characterizing linseed oil obtained using different extraction methods (hexane, subcritical propane and pressurized ethanol), and comparing the results with commercial linseed oil extracted by cold mechanical press method. An experimental design helped to evaluate temperature and pressure effects on the oil extraction using propane and ethanol. Gas chromatography assisted in evaluating the essential fatty acids. Read More

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http://dx.doi.org/10.17113/ftb.56.03.18.5318DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6233019PMC
September 2018
4 Reads

Plant polyphenol-inspired nano-engineering topological and chemical structures of commercial sponge surface for oils/organic solvents clean-up and recovery.

Chemosphere 2018 Nov 26;218:559-568. Epub 2018 Nov 26.

State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072 China. Electronic address:

In our study, plant polyphenol-inspired chemistry is explored to nano-engineer the topological and chemical structures of commercial melamine sponge surface for preparing superhydrophobic sponges. Briefly, tannic acid (TA, a typical plant polyphenol) is applied to induce the co-assembly of silica nanoparticles (SiO) and silver ions (Ag) to form SiO@TA@Ag nanostructures on a melamine sponge surface. After further chemical fluorination, the superhydrophobic sponge with a "lotus leaf-mimic" surface is formed. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2018.11.154DOI Listing
November 2018
3.340 Impact Factor

Production and purification of an alkaline lipase from sp. for enantioselective resolution of (±)-Ketoprofen butyl ester.

3 Biotech 2018 Dec 19;8(12):491. Epub 2018 Nov 19.

1School of Biotechnology, Shri Mata Vaishno Devi University, Katra, India.

The present study was conducted to purify lipase from indigenous strain Kakrayal_1 (BSK-L) for enantioselective resolution of racemic-ketoprofen. The production of lipase (BSK-L) was optimized using Plackett-Burman and central composite design of response surface methodology (RSM). The optimized media containing olive oil (3. Read More

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http://dx.doi.org/10.1007/s13205-018-1506-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6242800PMC
December 2018

Copper-catalyzed arene amination in pure aqueous ammonia.

Org Biomol Chem 2018 Nov 29. Epub 2018 Nov 29.

One-stop Sharing Facility Center for Future Drug Discoveries, Graduate School of Pharmaceutical Sciences, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, Japan.

A simple protocol for copper-catalyzed arene amination using aqueous ammonia without any additional ligands and organic coordinating solvents has been developed. The reaction pathway via a Cu(i)/Cu(iii) mechanism is proposed based on the results of control experiments as well as DFT calculations. Read More

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http://dx.doi.org/10.1039/c8ob02708kDOI Listing
November 2018